MOS-94P Multiple Launch Rocket System (MLRS) Repairer M142 HIMARS Download
Page 89 of 188
STP 9-94P1-SM-TG e. Hoses and fluid lines. 2. Perform troubleshooting procedures on the boom control system and isolate the malfunction to a faulty component. (Note: This task is to be performed in Maintenance Manager for the M270A1). a. Perform the following troubleshooting procedures if boom control system malfunction. b. Boom coast to a stop. c. Boom operation is erratic. d. Left or right boom will not extend. e. Left or right boom will not retract. 3. Remove the faulty component. a. Disconnect the electrical connector from connector J2. b. Disconnect the electrical connector P1 from connector J1. c. Remove the ground from cage structure; remove the four nuts and four washers. Use caution when removing nuts, one repairer need to support the assembly while removing assembly d. Remove the control assembly. 4. Install the replacement component. a. While one repairer positions the boom control assembly, the other repairer installs four bolts, eight washers, and four nuts. b. Tighten the nuts in crisscross sequence. c. Install the ground strap to cage structure. d. Connect the electrical connectors P1 to J1, and W26P2 or W27P2 to J2. 5. Verify the boom control system is operational. a. Use the BC to extend and retract the boom two times. b. Check for smooth operation, stow LM. 6. Complete maintenance forms. 1 October 2014 3-59